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®
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1
9
8
1
Programming
Reference
HP
54501A
Digitizing
Oscilloscope
Printing History
New
editions
are
complete
revisions
of
the
manual.
Update
packages,
which
are
issued
between
editions,
contain
additional
and
replacement
pages
to
be
merged
into
the
manual
by
the
customer.
The
dates
on
the
title
page
change
only
when
a
new
edition
is published.
A
software
code
may
be
printed
before
the
date;
this
indicates
the
version
of
the
software
product
at
the
time
the
manual
or
update
was
issued.
Many
product
updates
and
fixes do
not
require
manual
changes
and,
conversely,
manual
corrections
may
be
done
without
accompanying
product changes.
Therefore,
do
not
expect
a
one
to
one
correspondence
between
product updates
and
manual
updates.
Edition
1
June
1989
54501-90907
List
of
Effective
Pages
The
List
of
Effective
Pages gives
the
date
of
the
current
edition
and
of
any
pages
changed
in
updates
to
that
edition.
Within the
manual, any
page
changed
since
the
last
edition
is
indicated
by
printing
the
date
the
changes
were
made
on
the
bottom
of
the
page.
If
an
update
is
incorporated when
a
new
edition
of
the
manual
is
printed,
the
change
dates
are
removed
from
the
bottom
of
the
pages
and
the
new
edition
date
is listed
in
the
Printing
History
and
on
the
title
page.
Pages
Effective
Date
Product
Warranty
This
Hewlett-Packard
product
has
a
warranty
against
defects
in
material
and
workmanship
for
a
period
of
three years
from
date
of
shipment.
During
warranty
period,
Hewlett-Packard
Company
will,
at
its
option,
either
repair
or
replace products
that
prove
to
be
defective.
For
warranty
service
or
repair,
this
product
must
be
returned
to
a
service
facility
designated
by
Hewlett-Packard.
However, warranty
service
for
products
installed
by
Hewlett-Packard
and
certain
other
products
designated
by
Hewlett-Packard
will
be
performed
at
the
Buyer's facility
at
no
charge
within
the
Hewlett-Packard service travel
area.
Outside
Hewlett-Packard
service
travel
areas,
warranty
service
will
be
performed
at
the
Buyer's
faculty
only
upon
Hewlett-Packard's
prior
agreement
and
the
Buyer
shall
pay
Hewlett-Packard's
round
trip
travel
expenses.
For
products
returned
to
Hewlett-Packard for
warranty
service,
the
Buyer
shall
prepay
shipping charges
to Hewlett-Packard
and
Hewlett-Packard
shall
pay
shipping
charges
to
return
the
product
to
the
Buyer.
However,
the
Buyer
shall
pay
all
shipping charges,
duties,
and
taxes
for
products returned
to
Hewlett-Packard
from another
country.
Hewlett-Packard
warrants
that
its
software and
firmware
designated
by
Hewlett-Packard for
use
with
an
instrument
will
execute
its
programming
instructions
when
properly installed
on
that
instrument.
Hewlett-Packard
does
not
warrant
that
the
operation
of
the
instrument
software,
or
firmware
will
be
uninterrupted
or error-free.
Limitation
of
Warranty
The
foregoing
warranty
shall
not
apply
to
defects
resulting
from
improper
or
inadequate
maintenance
by the
Buyer,
Buyer-supplied
software
or
interfacing,
unauthorized
modification
or
misuse,
operation
outside
of the
environmental
specifications
for
the
product,
or
improper
site
preparation
or maintenance.
NO
OTHER WARRANTY
IS
EXPRESSED OR
IMPUED.
HEWLETT-PACKARD
SPECIFICALLY
DISCLAIMS
THE
IMPUED
WARRANTIES OF
MERCHANTABILITY AND
FITNESS
FOR
A
PARTICULAR
PURPOSE.
Exclusive
THE
REMEDIES PROVIDED
HEREIN
ARE
BUYER'S
SOLE
Remedies
AND
EXCLUSIVE
REMEDIES.
HEWLETT-PACKARD SHALL
NOT
BE
LIABLE
FOR
ANY
DIRECT,
INDIRECT,
SPECIAL,
INCIDENTAL,
OR CONSEQUENTIAL
DAMAGES,
WHETHER
BASED ON
CONTRACT,
TORT,
OR
ANY
OTHER LEGAL
THEORY.
Assistance Product
maintenance
agreements
and
other
customer
assistance
agreements
are
available for
Hewlett-Packard
products.
For
assistance,
contact
your
nearest
Hewlett-Packard
Sales
and Service
Office.
Certification
Hewlett-Packard
Company
certifies
that
this
product
met
its
published
specifications
at
the
time
of
shipment
from
the
factory.
Hewlett-Packard further
certifies that
its
calibration
measurements
are
traceable to
the
United
States
National
Bureau
of
Standards, to
the
extent
allowed
by the
Bureau's
calibration
facility,
and
to
the
calibration
facilities
of
other International
Standards
Organization
members.
Safety
This
product
has
been
designed
and
tested
according
to International
Safety
Requirements.
To
ensure
safe
operation
and to
keep
the
product
safe,
the
information,
cautions,
and
warnings
in
this
manual
must
be
heeded.
Introduction
This
manual
explains
how to
program
the
HP
54501A Digitizing
Oscilloscope
and
lists
the
commands
and
queries
associated
with
this
instrument.
It
is
divided
into
17
chapters
and
2
appendices.
Chapter
1
introduces
you
to
the
programming
syntax
required
to
program
this
instrument
and
provides
some
basic
programming
concepts
to
get
you
started
programming..
Chapter
2
describes
the
interface functions
and
some
general
concepts
of
HP-IB.
Chapter
3
describes
the
operation
of
instruments
that
operate
in
compliance
with
the
IEEE 4882
standard.
This
chapter
also
describes
the
status
reporting features
that
are
available
over
the
HP-IB.
Chapter
4
covers
the
conventions
which
are
used
to
program
the
instrument as
well as
conventions
used
in the
remainder
of
this
manual.
This chapter
also
includes
a complete
command tree
and
alphabetic
command
cross-reference.
Chapter
5 lists
the
Common Commands
which
are
the
commands
defined
by
IEEE
488.2.
These
commands
control
some
functions
that
are
common
to
all
IEEE
488.2
instruments.
Chapter
6 lists
the
Root Level
Commands
which
control
many
of
the basic
functions of
the
instrument.
Chapter
7 lists
the
System
Subsystem
Commands
which
control
some
basic
functions of the
oscilloscope.
Chapter
8
lists
the
Acquire
Subsystem
Commands
which
set
the
parameters
for
acquiring
and
storing
data.
Chapter
9 lists
the
Calibrate
Subsystem
Commands
which set
time
nulls
(channel-to-channel
skew).
HP
54501A
Programming
Introduction-1
Chapter
10
lists
the
Channel
Subsystem
Commands
which
control
all
Y-axis
oscilloscope
functions.
Chapter
11
lists
the
Display
Subsystem
Commands
which
control
how
waveforms,
voltage
and
time
markers,
graticule,
and
text
are
displayed
and written
on
the
screen.
Chapter
12 lists
the
Function
Subsystem
Commands
which
control
the
waveform
math
functions of
the
oscilloscope.
Chapter
13
lists
the
Hardcopy Subsystem
Commands
which
control
the
parameters
used
during
the
printing
of
waveforms.
Chapter
14
lists
the
Measure
Subsystem
Commands
which
select
the
automatic
measurements
to
be
made.
Chapter
15 lists
the
Timebase
Subsystem
Commands
which
control
all
X-axis
oscilloscope
functions.
Chapter
16
lists
the
Trigger
Subsystem
Commands
which
control
the
trigger
modes
and
parameters
for
each
trigger
mode.
Chapter
17
lists
the
Waveform Subsystem Commands
which
provide
access
to
waveform data,
including
active
data
from
channels and
functions
as
well
as
static
data
from
waveform
memories.
Appendix
A
provides
details
on
how automatic
measurements
are
calculated
and
offers
some
tips
on
how to
improve
results.
Appendix
B
contains
example
programs
using
the
command
set
from
the
HP
54501A.
At
the end of
the
manual
is
Quick
Reference
Guide
that
lists
the
commands
and
queries
with their
corresponding
arguments
and
returned
formats. Also,
at
the
end
of
the
manual
is
a
complete
index
for
easy reference
of
commands
and
functions.
Introduction-2
HP
54501A
Programming
Contents
Introduction
Chapter
1:
Introduction
to
Programming
an
Oscilloscope
Introduction
................................................
1-1
Programming
Syntax
.........................................
1-2
Talking
to
the
Instrument
..................................
1-2
Addressing
the
Instrument
.................................
1-3
Program
Message
Syntax
...................................
1-4
Separator
................................................
1-5
Command
Syntax
.........................................
1-5
Query
Command
.........................................
1-7
Program
Header
Options
..................................
1-8
Program
Data
............................................
1-8
Program
Message
Terminator
..............................
1-9
Selecting
Multiple
Subsystems
.............................
1-10
Summary
...............................................
1-10
Programming an
Oscilloscope
................................
1-11
Initialization.............................................
1-11
Autoscale
...............................................
1-12
Setting
Up
the
Instrument
.................................
1-12
Receiving
Information
from
the
Instrument
..................
1-13
Response Header
Options
................................
1-14
Response
Data Formats
..................................
1-15
String
Variables
.........................................
1-16
Numeric
Variables
.......................................
1-17
Definite-Length
Block
Response
Data
......................
1-18
Multiple
Queries.........................................
1-19
Instrument
Status
........................................
1-19
Digitize
Command
.......................................
1-20
HP
54501A
Programming
Contents-1
Chapter
2:
Chapter
3:
Interface
Functions
Introduction
................................................
2-1
Interface
Capabilities
........................................
2-1
Command
and
Data
Concepts
.................................2-1
Addressing
.................................................2-1
Remote,
Local
and
Local
Lockout
.............................2-2
Bus
Commands
.............................................
2-3
Device
Clear
.............................................2-3
Group
Execute
Trigger
(GET)
..............................2-3
Interface
Clear
(IFC)
......................................2-3
Status
Annunciators
.........................................2-3
I——————————————————————————————————————
Message
Communication
and
System Functions
Protocols
...................................................3-1
Functional
Elements
......................................
3-1
Protocol
Overview
........................................
3-2
Protocol
Operation........................................
3-2
Protocol
Exceptions
.......................................3-3
Syntax
Diagrams
............................................
3-5
Syntax
Overview.............................................
3-5
Device
Listening
Syntax
....................................3-8
Device
Talking
Syntax
....................................3-21
Common
Commands........................................
3-27
Status
Reporting
...........................................3-28
Bit
Definitions
...........................................3-30
Key
Features
............................................
3-31
Serial
Poll...............................................3-32
Parallel
Poll
.............................................3-34
Polling
HP-IB
Devices.
...................................3-36
Configuring
Parallel
Poll
Responses
........................
3-36
Conducting
a
Parallel
Poll.................................3-37
Disabling
Parallel
Poll
Responses
..........................3-37
HP-IB Commands
.......................................3-37
Contents-2
HP
54501A
Programming
Chapter
4:
Chapter
5:
Programming
and
Documentation
Conventions
Introduction
................................................
4-1
Truncation
Rules
............................................
4-1
The
Command
Tree
.........................................4-4
Command
Types
..........................................4-4
Tree
Traversal
Rules
......................................4-5
Examples
................................................
4-5
Infinity
Representation
.......................................4-6
Sequential
and
Overlapped
Commands.
........................
4-7
Response
Generation
........................................4-7
Notation Conventions and Definitions
..........................
4-7
Syntax Diagrams
............................................4-8
Command
Structure
.........................................
4-9
Common
Commands
......................................
4-9
Root
Level
Commands
....................................
4-9
Subsystem
Commands
.....................................
4-9
Program
Examples
.........................................4-11
Command
Set
Organization
..................................4-12
I————————————————————————————————————————
Common Commands
*CLS
......................................................5-4
*ESE
......................................................5-5
*ESR
......................................................5-7
*IDN
......................................................5-9
*IST
......................................................5-10
*LRN.....................................................5-11
*OPC.....................................................5-12
*OPT
.....................................................5-13
*PRE
.....................................................5-14
*RCL.....................................................5-15
*RST
.....................................................5-16
*SAV
.....................................................5-18
*SRE
.....................................................5-19
*STB
.....................................................5-21
*TRG
....................................................5-23
*TST
.....................................................5-24
*WAI.....................................................5-25
HP
54501A
Programming
Contents-3
Chapter
6:
Chapter
7:
Root
Level
Commands
Introduction
................................................6-1
AUToscale
.................................................6-4
BEEPer
....................................................6-5
BLANk
....................................................6-6
DIGitize
...................................................6-7
EOI
.......................................................6-8
ERASe
....................................................6-9
LER......................................................6-10
LTER
....................................................6-11
MENU
...................................................6-12
MERGe
..................................................6-13
PRINt
....................................................6-14
RUN
.....................................................6-15
SERial
...................................................
.6-16
STOP
.....................................................6-17
STORe
..................................................
.6-18
TER
......................................................6-19
VIEW
....................................................6-20
I————————————————————————————————————————
System Subsystem
Introduction
................................................7-1
DSP
.......................................................7-3
ERRor.....................................................7-4
HEADer
...................................................7-6
KEY.......................................................7-7
LONGform.................................................7-9
SETup
....................................................7-10
Contents-4
HP
54501A
Programming
Chapter
8:
Chapter
9:
Chapter
10:
Chapter
11:
Acquire
Subsystem
Introduction
................................................8-1
(Normal)
Persistence Mode
...................................8-1
Averaging
Mode
............................................8-2
Envelope
Mode
.............................................8-2
COMPlete..................................................8-4
COUNt
....................................................8-5
POINts
....................................................8-6
TYPE
.....................................................8-7
I——————————————————————————————————————
Calibrate
Subsystem
Introduction
................................................9-1
TNUL1.....................................................9-2
I——————————————————————————————————————
Channel
Subsystem
Introduction
...............................................
10-1
COUPling
................................................
.10-3
ECL
......................................................10-4
HFReject
.................................................
10-5
OFFSet
...................................................10-6
PROBe
...................................................
10-7
RANGe
..................................................
.10-8
TTL
......................................................
10-9
I————————————————————————————————————————
Display
Subsystem
Introduction
...............................................
11-1
COLumn
..................................................
11-4
CONNect
.................................................
11-5
DATA
...................................................
.11-6
FORMat
..................................................11-8
GRATicule
................................................
11-9
INVerse..................................................
11-10
LINE
....................................................11-11
MASK
...................................................
11-12
PERSistence
..............................................
11-14
HP
54501A
Programming
Contents-5
Chapter
12:
Chapter
13:
Chapter
14:
ROW
....................................................11-15
SCReen
..................................................
11-16
SOURce
................................................
.11-17
STRing
..................................................11-18
TEXT
...................................................
11-19
TMARker
................................................
11-20
VMARker
.'...............................................
11-21
I————————————————————————————————————————
Function Subsystem
Introduction
...............................................
12-1
ADD
.....................................................
12-4
INVert
...................................................
.12-5
MULTiply................................................
.12-6
OFFSet
...................................................12-7
ONLY
....................................................
12-8
RANGe
..................................................
.12-9
SUBTract
................................................
12-10
VERSUS
.................................................
12-11
I——————————————————————————————————————
Hardcopy
Subsystem
Introduction
...............................................
13-1
LENGth
.................................................
.13-2
PAGE
....................................................13-3
I————————————————————————————————————————
Measure
Subsystem
Introduction
...............................................
14-1
Measurement
Setup
........................................
14-1
User-Defined
Measurements.................................
14-1
Measurement
Error.........................................
14-2
Making
Measurements
......................................
14-2
ALL
.....................................................
14-11
COMPare
................................................
14-12
CURSor
................................................
.14-14
DEFine
..................................................14-15
DELay...................................................
14-17
DESTination
............................................
.14-18
DUTycycle
..............................................
.14-19
ESTArt
.................................................
.14-20
Contents-6
HP
54501A
Programming
ESTOp
.................................................
.14-22
FALLtime................................................14-24
FREQuency
..............................................
14-25
LIMittest................................................
.14-26
LOWer
.................................................
.14-27
MODE
.................................................
.14-28
NWIDth
.................................................14-29
OVERshoot
.............................................
.14-30
PERiod
..................................................14-31
POSTfailure
..............................................14-32
PRECision
..............................................
.14-33
PREShoot...............................................
.14-34
PWIDth..................................................14-35
RESults
.................................................
.14-36
RISetime
.................................................
14-37
SCRatch
.................................................14-38
SOURce
................................................
.14-39
STATistics
...............................................14-40
TDELta..................................................
14-41
TMAX...................................................
14-42
TMIN
...................................................14-43
TSTArt
..................................................14-44
TSTOp
..................................................14-45
TVOLt
..................................................14-46
UNITs
...................................................14-48
UPPer
..................................................
.14-49
VAMPlitude
.............................................
.14-50
VAVerage...............................................
.14-51
VBASe
.................................................
.14-52
VDELta
................................................
.14-53
VFIFty
...................................................
14-54
VMAX
.................................................
.14-55
VMIN
...................................................14-56
VPP
.....................................................14-57
VRELative
...............................................
14-58
VRMS
...................................................14-60
VSTArt
.................................................
.14-61
VSTOp
.................................................
.14-62
VTIMe
..................................................14-63
VTOP
...................................................14-64
HP
54501A
Programming
Corrtents-7
Chapter
15:
Chapter
16:
Timebase
Subsystem
Introduction
...............................................
15-1
DELay....................................................15-3
MODE
...................................................
15-4
RANGe
...................................................
15-5
REFerence
................................................
15-6
WINDOW
..................................................
15-7
WINDowDELay...........................................
15-8
WINDowRANGe
..........................................
15-9
I——————————————————————————————————————
Trigger Subsystem
Introduction
...............................................
16-1
The
EDGE
Trigger
Mode
...................................
16-3
The
Pattern
Trigger
Mode
...................................
16-4
The
State Trigger
Mode
.....................................
16-5
The
Delay
Trigger
Mode
....................................
16-6
The
TV
Trigger
Mode
......................................
16-7
CONDition
...............................................
16-13
DELay...................................................16-16
DELaySLOPe
...........................................
.16-17
DELay:SOURce
.........................................
.16-18
FIELd
...................................................16-19
HOLDoff
...............................................
.16-20
LEVel
...................................................
16-21
LINE
....................................................16-22
LOGic
...................................................
16-23
MODE
.................................................
.16-24
Occurrence
..............................................
16-25
OCCurrence:SLOPe
......................................
.16-26
OCCurrence:SOURce
.....................................
16-27
PATH
...................................................16-28
POLarity
................................................
.16-29
QUALify................................................
.16-30
SLOPe
..................................................
.16-32
SOURce
................................................
.16-33
STANdard
..............................................
.16-34
Contents-8
HP
54501A
Programming
Chapter
17:
Waveform
Subsystem
Introduction
...............................................
17-1
Data
Acquisition
Types
.....................................
17-2
Normal
.................................................
17-2
Average
................................................
17-3
Envelope
...............................................
17-3
Data Conversion
...........................................
17-4
Conversion
from Data
Value to
Voltage
.....................
17-4
Conversion
from
Data
Value
to
Time
.......................
17-4
Data Format
for HP-IB
Transfer
.............................
17-5
WORD
Format
.........................................
.17-5
BYTE
Format
...........................................
17-6
COMPRESSED
Format
..................................
17-6
ASCII
Format
...........................................
17-6
COUNt
...................................................
17-9
DATA
...................................................17-10
FORMat
.................................................
17-12
POINts
..................................................17-13
PREamble
..............................................
.17-14
SOURce
................................................
.17-16
TYPE
...................................................17-17
XINCrement
.............................................
.17-18
XORigin
................................................
.17-19
XREFerence
.............................................
17-20
YINCrement.............................................
.17-21
YORigin
................................................
.17-22
YREFerence
............................................
.17-23
HP
54501A
Programming
Contents-9
Appendix
A:
Appendix
B:
Algorithms
Introduction
...............................................
A-l
Measurement
Setup
........................................
A-l
Making
Measurements
......................................
A-l
Automatic
Top-Base
........................................
A-2
Edge
Definition
............................................
A-2
Algorithm
Definitions
.......................................
A-3
delay
...................................................A-3
+
width
................................................A-4
-
width
.................................................A-5
Period
..................................................A-5
Frequency
..............................................A-5
Duty
Cycle
..............................................A-5
Risetime
................................................
A-5
Falltime
................................................
A-5
Vmax
..................................................A-5
Vmin
...................................................A-5
Vp-p
...................................................
A-5
Vtop
...................................................A-5
Vbase
..................................................A-6
Vamp
..................................................A-6
Vavg
...................................................A-6
Vrms
...................................................
A-6
I————————————————————————————————————————
Example Programs
Introduction
...............................................
B-l
Vertical Channel
Setup Program
..............................
B-2
Timebase
Program
.........................................
B-4
Measurement
Setup
Program
................................
B-6
Digitize
Program
...........................................
B-9
Hardcopy
Program
(Service
Request
using
OPC)
..............
B-ll
Waveform
Template
Program
...............................
B-12
Quick
Reference
Guide
Index
Contents-10
HP
54501A
Programming
Introduction
to
Programming
an
Oscilloscope
1
Introduction
This
chapter
introduces
you to
the
basic
concepts
ofHP-IB
communication
and
provides
information
and
examples
to
get
you
started
programming.
The
exact
mnemonics
for
the
commands
are
listed
in
chapters
5
through
17.
There
are
four
basic
operations
that
can
be
done
with
a
controller
and
an
oscilloscope
via
HP-IB.
You
can:
1.
Set
up
the
instrument
and start
measurements
2.
Retrieve setup information
and
measurement
results
3.
Digitize
a
waveform
and
pass
the
data
to
the
controller
4.
Send
measurement
data
to
the
instrument
Other
more
complicated
tasks
are
accomplished
with
a
combination of
these
four
basic
functions.
This chapter
deals
mainly
with
how
to
set
up
the
instrument,
how
to
retrieve
setup information
and
measurement
results,
how to
digitize
a
waveform,
and
how
to
pass
data
to
the
controller.
The
chapter
is
divided
into
two
sections.
The
first
section
(page
1-2)
concentrates on
program
syntax,
and
the
second
section
(page
1-11)
discusses
programming
an
oscilloscope.
Refer
to
the
chapter "Measure
Subsystem"
for information
on
sending
measurement
data to
the
instrument.
Note
The programming
examples
in
this
manual
are
written
in
HP
Basic
4.0
for
an
HP
9000
Series
2001300
Controller.
HP
54501A
Programming
Introduction
to
Programming
an
Oscilloscope
1-1
Programming
Syntax
Talking
to
the
Instrument
In
general,
computers
acting
as
controllers
communicate
with
the
instrument
by passing
messages
over
a
remote
interface
using
the
I/O
statements
provided
in
the
instruction set
of
the controller's
host
language.
Hence,
the HPSL
1.0 messages
for
programming
the
HP
54501A,
described in
this
manual,
will
normally
appear
as
ASCII
character
strings
imbedded
inside
the
I/O
statements
of
your
controller's
program.
For
example, the
HP
9000
Series
200/300
BASIC
and
PASCAL
language
systems
use
the OUTPUT
statement
for
sending
program
messages
to
the
HP 54501A,
and
the
ENTER
statement
for
receiving
response
messages
from
the
HP
54501A.
Messages
are
placed
on
the
bus
using
an output
command
and
passing
the
device
address,
program
message,
and
terminator.
Passing
the
device
address
ensures
that
the
program
message
is
sent
to
the
correct
interface
and
instrument.
The
following
command
turns
the
command
headers
on:
OUTPUT
<
device address
>
;":SYSTEM:HEADER
ON"
<
terminator
>
<
device address
>
represents
the address
of
the device
being
programmed.
Note
The
programming
examples
in this
manual
are
written
in
HP
Basic
4.0
for
an
HP
9000
Series
200/300
Controller.
Introduction to
Programming an
Oscilloscope
1-2
HP
54501A
Programming
/
